Overview
The CDN AF3 is part of the coupling decoupling network series for conducted common mode immunity testing according to IEC 61000-4-6. The CDN AF3 is compliant to IEC 61000-4-6 Annex D3 and is suitable for immunity testing on unscreened and unbalanced control lines with moderate currents.
The CDN AF3 is intended to inject common mode disturbance signals to control lines in the frequency range 150 kHz to 230 MHz. The circuitry is shown in Fig. 5.
All CDNs comply to the requirements of IEC 61000-4-6. Each CDN comes with individually measured data and a calibration certificate for the common mode impedance and the voltage division factor. Further typical data can be found in fig. 3 and fig. 4
A variety of calibration adapters and other accessories is available as option.
Important Note: The optional shorting adapters must not be used if the CDN is connected to mains! The capacitors at the AE-side are not equipped with discharging resistors.
The connection to ground can be accomplished using the ground plane of the CDN. Additionally there is a M4 thread located at the AE side to ground as well as a 4 mm socket to connect the device to ground.
To improve the operational safety the connections are carried out as security sockets. We recommend to use special 4 mm security plugs if you plan to design your own adapters. Those connectors can be purchased optionally.
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| Fig. 1: typ. EuT common mode impedance | Fig. 2: typ. phase EuT-Port, common- mode |
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| Fig. 3: typical voltage division factor RF-port to EuT port | Fig. 4: typ. isolation AE to RF-port |
| Specifications | |
| Frequency range | 0.15 … 230 MHz |
| Common mode impedance | 150kHz–24MHz: 150 Ω ±20 Ω 24MHz–80MHz: 150 Ω +60 Ω /-45 Ω 80MHz-230MHz: 150 Ω +60 Ω /-60 Ω |
| Max. RF-test voltage (emf) | 30 V |
| RF-input-power | 6 W (continuous) |
| RF-input connector | 50 23 Ω BNC (female) |
| Voltage division factor RF-input – EuT-port | 9.5 dB 150 kHz – 80 MHz: ± 1dB 80 MHz – 300 MHz: +3 dB / - 2 dB |
| Input Voltage EuT (AE) | 100 VAC / 150 VDC |
| Current rating | 4 A, DC |
| Housing material | Aluminium |
| Housing dimensions | 120 x 105 x 225 mm |
| Weight | ca. 1320 g |
| EuT, AE connectors | 4 mm safety banana jacks |
| Included accessories | CA 3/4 |
| 3 Pin shorting bar | (2 units included by default) |
| Optional accessories 30 mm distance adapter 50 Ω to 150 adapter |
SR 30/4 SR 100-6W |
